Mokarami Hamidreza, Kalteh Haji Omid, Marioryad Hossein
Department of Ergonomics, School of Health, Shiraz University of Medical Sciences, Shiraz, Iran.
Department of Occupational Health Engineering, Faculty of Health, Mazandaran University of Medical Sciences, Sari, Iran.
Work. 2020;65(1):137-143. doi: 10.3233/WOR-193066.
The Work Ability Index (WAI) is a suitable and valid instrument, which provides a general view of workers' abilities and functional capacities.
This study aimed to evaluate the effect of work-related and sociodemographic factors on work ability among employees of a company in Iran.
This cross-sectional study was conducted on 167 employees. Work ability was measured by the Persian version of WAI. A questionnaire was also developed to assess work-related and sociodemographic factors. The data were analyzed using univariate analysis of variance (ANOVA), independent t-test, and Pearson's correlation.
The mean (SD) score of WAI was 38.4 (6.4). WAI mean score (p < 0.05) was associated with age, gender, sleep quality, smoking, work schedule, the conflict between the work and individual, family, and social lives, work injuries, and job satisfaction.
To improve the workers' work ability, interventional programs should be concentrated on changing work schedules, improving sleep quality, limiting work hours, and not scheduling sensitive individuals to night shifts, those whose circadian rhythm stability and circadian rhythm amplitude is rigid type and languid type, respectively.
工作能力指数（WAI）是一种合适且有效的工具，能提供工人能力和功能水平的总体情况。
本研究旨在评估与工作相关因素和社会人口学因素对伊朗一家公司员工工作能力的影响。
对167名员工进行了这项横断面研究。工作能力通过WAI的波斯语版本进行测量。还编制了一份问卷来评估与工作相关因素和社会人口学因素。数据采用单因素方差分析（ANOVA）、独立t检验和Pearson相关性分析。
WAI的平均（标准差）得分为38.4（6.4）。WAI平均得分（p<0.05）与年龄、性别、睡眠质量、吸烟、工作时间表、工作与个人、家庭及社会生活之间的冲突、工伤和工作满意度相关。
为提高工人的工作能力，干预项目应集中于改变工作时间表、改善睡眠质量、限制工作时间，且不要将敏感个体安排到夜班，即分别是昼夜节律稳定性为刚性类型和昼夜节律幅度为慵懒类型的个体。
